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	<div id="contenu">		
		<center><h3>ForceField FEM on Tetrahedra</h3></center>		
		<center><img src="ForceField.png" align="middle" width="300"></center>
                
		<div id="orangeText">Description:</div>
		
			The TetrahedronFEMForceField component is used to model an object by the Finite Element Method on a mesh composed tetrahedron.
			There are three main methods of  computation: 
			<ul>
				<li>small : the simplest method using linear formulation in case of small displacement</li>
				<li>large : the corotational formulation allowing large displacement</li>
				<li>polar : the polar decomposition formulation allowing large displacement</li>
			</ul>
			<p>
				Trivial user can use at least two main parameters related to the linear elasticity property of the modeled object
			</p>
			<ul>
				<li>Young's modulus</li>
				<li>Poisson's ratio</li>
			</ul>
			<p>
				By adjusting these coefficients, one can understand its relation with the mechanical behavior of objects and then 
				can choose the appropriated parameters. There are also other parameters for advanced users :
			</p>
			<ul>
				<li>localStiffnessFactor</li>
				<li>updateStiffnessMatrix</li>
				<li>computeGlobalMatrix</li>
				<li>etc.</li>
			</ul>
			<p>
				By double-clicking on the component, users can see all the parameters of the component. 
			</p>		
		<div id="orangeText">Key Points:</div>
		<ul>
			<li>TetrahedronFEMForceField works only with a tetrahedra mesh</li>
			<li>Technical documentation [Nesme, Matthieu and Payan, Yohan and Faure, Francois] , <i>Efficient Physically Plausible Finite Elements</i> .2005</li>
		</ul>
		<div id="orangeText">Results:</div><br>
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